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chdir FILEHANDLE
chdir DIRHANDLE
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  On systems that support fchdir(2), you may pass a filehandle or directory handle as the argument. On systems that don't support fchdir(2), passing handles raises an exception.

##</code><code>##

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STANDARDS
     The chdir() system call is expected to conform to IEEE Std 1003.1-1990 (“POSIX.1”).

HISTORY
  The chdir() system call appeared in Version 1 AT&T UNIX. The fchdir() system call appeared in 4.2BSD.